fontconfig: force --disable-docs option (#88364)
fontconfig: force --disable-docs option (#88364)

The `without-docs` option which adds `--disable-docs` to the configure step was removed in this commit https://github.com/Homebrew/homebrew-core/commit/0643a07a30b6c3bd69c16860a179c428c29f3e73
However, this option is still needed as people don't always have docbook2pdf installed
chrisfinazzo/homebrew-core,filcab/homebrew-core,stgraber/homebrew-core,cblecker/homebrew-core,sjackman/homebrew-core,mfikes/homebrew-core,nbari/homebrew-core,makigumo/homebrew-core,sjackman/homebrew-core,adam-moss/homebrew-core,makigumo/homebrew-core,lemzwerg/homebrew-core,zyedidia/homebrew-core,nbari/homebrew-core,lemzwerg/homebrew-core,zyedidia/homebrew-core,cblecker/homebrew-core,Homebrew/homebrew-core,adam-moss/homebrew-core,filcab/homebrew-core,uyjulian/homebrew-core,nandub/homebrew-core,mfikes/homebrew-core,stgraber/homebrew-core,nandub/homebrew-core,uyjulian/homebrew-core,Homebrew/homebrew-core,chrisfinazzo/homebrew-core